CN217544717U - Battery module and electric device - Google Patents

Abstract

The utility model discloses a battery module, include: the single batteries are arranged side by side and connected in series, each single battery is provided with two pole columns with opposite polarities, the two pole columns are respectively positioned at two opposite sides of each single battery, and the poles at the same side of two adjacent single batteries are opposite in polarity; the signal acquisition components are respectively positioned on two opposite sides of the single battery and connected with different poles on the single battery so as to acquire signals of the two poles on the single battery, wherein the signal acquisition components comprise a PCB (printed circuit board) and a plurality of voltage detection probes for being connected with the poles, and the voltage detection probes are sequentially arranged on the PCB along the arrangement direction of the single battery; and the two signal acquisition parts are respectively and electrically connected to the signal processing unit. The utility model provides a battery module for solve among the prior art to the unstable problem of battery cell signal detection, and the inconvenient fixed, the easy problem of rocking of signal acquisition part.

Description

Battery module and electric device

Technical Field

The utility model relates to a battery module technical field especially relates to a battery module and power consumption device.

Background

In the existing battery module, when the anode and the cathode of a single battery are located at two sides of the battery, a set of signal acquisition component is generally adopted and installed at one side of the battery module, the position of the signal acquisition component corresponds to that of the pole at one side of the single battery, the pole at the other side of the single battery is led into the signal acquisition component in a wiring harness or other forms, so that the voltage and/or temperature of the two poles of the single battery can be acquired by using the same set of signal acquisition component, but the problems of complicated wiring harness lead, large line voltage drop, inaccurate acquisition and the like exist.

In addition, in the existing battery module, the signal acquisition components all adopt flexible printed circuit boards (FPCs), but the following problems exist: the flexible circuit board is difficult to fix and complex in connection, and in the environment that the pole is laterally led out, the flexible circuit board is easy to tear due to the vibration of the battery pack, so that signal acquisition is unstable.

SUMMERY OF THE UTILITY MODEL

In order to overcome above-mentioned prior art an at least defect, the utility model provides a battery module to unstable problem of battery cell signal detection among the solution prior art, and the inconvenient fixed, the easy problem of rocking of signal acquisition part.

The utility model discloses a solve the technical scheme that its problem adopted and be:

a battery module, comprising:

the single batteries are arranged side by side and connected in series, each single battery is provided with two pole columns with opposite polarities, the two pole columns are respectively positioned at two opposite sides of each single battery, and the poles at the same side of two adjacent single batteries are opposite in polarity;

the signal acquisition components are respectively positioned on two opposite sides of the single battery and connected with different poles on the single battery so as to acquire voltage signals of the two poles on the single battery, wherein the signal acquisition components comprise a PCB (printed circuit board) and a plurality of voltage detection probes for being connected with the poles, and the voltage detection probes are sequentially arranged on the PCB along the arrangement direction of the single battery;

and the two signal acquisition components are respectively connected to the signal processing unit.

The utility model provides a battery module, through installing signal acquisition component respectively in monomer battery both sides, utilize two relatively independent signal acquisition components to gather the voltage signal of monomer battery two utmost point posts respectively to connect the signal of two signal acquisition components to the signal processing unit respectively, handle respectively, in order to improve the stability of signal detection; in addition, the signal acquisition component adopts the PCB as a main body structure, the voltage detection probes are arranged and arranged on the PCB, and the PCB is utilized to provide a certain supporting function, such as rigid support for arranging a plurality of single batteries and/or rigid support for the voltage detection probes, so that the shaking of the single batteries is reduced, the deformation of the positions of the voltage detection probes is avoided, and the alignment of the voltage detection probes and the poles is facilitated.

The utility model discloses another aspect still provides an electric installation, and this electric installation includes as above battery module.

Drawings

Fig. 1 is a schematic structural diagram of a battery module according to an embodiment of the present invention;

fig. 2 is an exploded schematic view of a battery module according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a single battery according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a signal acquisition component according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a connecting member according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a fixing frame according to an embodiment of the present invention;

fig. 7 is a schematic structural view of the subframe body shown in fig. 6;

fig. 8 is an enlarged view of a portion a shown in fig. 1.

Wherein the reference numerals have the following meanings:

1. a single battery; 11. a battery case; 12. a pole column; 2. a signal acquisition component; 21. a PCB board; 211. screwing holes; 22. a voltage detection probe; 23. a signal processing unit; 24. a fault detection probe; 25. a flexible circuit board; 26. a connector; 3. a connecting member; 31. a U-shaped main body; 32. folding edges; 33. connecting holes; 4. a fixed mount; 401. a sub-frame body; 41. mounting grooves; 42. a through groove; 43. an isolation column; 44. a pin; 5. a box body; 51. a bracket type liquid cooling plate; 52. enclosing plates; 6. a movable pressing plate; 7. a compression member; 71. a filler strip; 8. abutting against the board.

Detailed Description

For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1 and 2, the utility model discloses a battery module, include: the battery signal acquisition device comprises a plurality of single batteries 1 arranged side by side and connected in series, two signal acquisition parts 2 and a signal processing unit 23, wherein the two signal acquisition parts 2 are arranged for acquiring battery signals of the single batteries 1, and the two signal acquisition parts 2 are respectively and electrically connected to the signal processing unit 23. The battery signal may include a voltage signal, a temperature signal, and the like.

The single battery 1 has two pole columns 12 with opposite polarities, the two pole columns 12 are respectively located on two opposite sides of the single battery 1, and the poles 12 on the same side of two adjacent single batteries 1 have opposite polarities, so as to facilitate the series connection between the two adjacent single batteries 1. Specifically, the two poles 12 are a positive pole and a negative pole, respectively.

Referring to fig. 2 and 3, specifically, the single battery 1 includes a battery case 11 and two pole columns 12, the battery case 11 is in a thin plate shape, the two pole columns are respectively disposed on two sides of the battery case 11 in the length direction, and the plurality of single batteries 1 are arranged along the thickness direction of the battery case 11; of course, the two-pole posts 12 may be disposed on both sides of the battery case 11 in the height direction, respectively, according to other requirements of the battery module. In the present embodiment, the two pole posts 12 are respectively located at two sides of the battery case 11 in the length direction.

Two signal acquisition parts 2 are located the relative both sides of battery cell 1 respectively and are connected with different utmost point post 12 on the battery cell 1 to gather the voltage signal of two utmost point posts 12 on the battery cell 1, and on the same principle, two signal acquisition parts 2 are located 11 length direction's of battery case both sides respectively, so that signal acquisition part 2 and utmost point post 12's electric connection and physical connection.

So, through installing signal acquisition component 2 respectively in battery cell 1 both sides, utilize two relatively independent signal acquisition component 2 to gather the voltage signal of battery cell 1 two utmost point posts 12 respectively, compare in homonymy collection, can improve because the influence of battery case corruption to the voltage signal degree of accuracy that detects, on this basis, be connected to signal processing unit 23 respectively with the signal of two signal acquisition component 2 again, handle respectively to improve signal detection's stability.

Referring to fig. 4, in particular, the signal acquisition component 2 includes a PCB 21 and a plurality of voltage detection probes 22 for connecting with the pole 12, and the plurality of voltage detection probes 222 are sequentially disposed on the PCB 21 along the arrangement direction of the single batteries 1.

Through the scheme, the signal acquisition component 2 adopts the PCB 21 as a main body structure, arranges the voltage detection probes 22 on the PCB 21, and utilizes the PCB 21 to provide a certain supporting effect, such as rigid support for arranging a plurality of single batteries 1 and/or rigid support for the voltage detection probes 22, so that the shaking of the single batteries 1 is reduced, the deformation of the positions of the voltage detection probes 22 is avoided, and the alignment of the voltage detection probes 22 and the polar columns 12 is facilitated.

Specifically, the voltage detecting probes 22 are nickel plates, and all the voltage detecting probes 22 are welded to the lower edge of the PCB 21. Of course, the position of the voltage detection probe 22 on the PCB 21 can be soldered to other positions of the PCB 21 as required.

More importantly, the number of the signal processing units 23 is two, and the two signal processing units 23 are respectively disposed on the two PCB boards 21, so that the signal processing units 23 are integrated into the signal collecting component 2, and specifically, the signal processing units 23 are soldered on the PCB boards 21 to achieve electrical connection and physical connection therebetween.

Through the above scheme, utilize PCB board 21 to support signal processing unit 23, need not to set up special bearing structure again, reduce spare part quantity and equipment step, reduce cost, the battery signal that each signal acquisition part 2 gathered simultaneously all can be handled by signal processing unit 23 direct on PCB board 21 by integrated to this realizes handling respectively of the battery signal that both sides were gathered, and the integrated level is high, reduces the pencil, further improves the collection precision.

Referring to fig. 4 and 8, in this embodiment, the voltage detection probes 22 on each signal acquisition component 2 acquire the voltage signals of the poles 12 located on the same side at intervals, which is specifically shown in that, except the voltage detection probes 22 at the first and last ends, the arrangement distance of two adjacent voltage detection probes 22 is substantially equal to twice the arrangement distance of two adjacent single batteries 1, and by virtue of the serial connection between two adjacent single batteries 1, the voltage detection probes 22 simultaneously acquire the voltage signals of the poles 12 on the same side of two adjacent single batteries 1, and on the premise that the two pole columns 12 of each single battery 1 can be detected, the number of the voltage detection probes 22 in each signal acquisition component 2 is reduced, so as to facilitate the installation of the voltage detection probes 22, and solve the problem of inconvenient installation on the same side caused by the larger number of the serial batteries and the larger circuit board when the same-side acquisition is performed.

Referring to fig. 2, 6 and 8, in the present embodiment, the battery module further includes a plurality of connecting members 3 and two fixing frames 4, the connecting members 3 are configured to electrically connect the plurality of single batteries 1 in series, and the fixing frames 4 serve as bearing members for clamping and fixing the single batteries 1 arranged side by side, and for bearing the PCB 21 and the connecting members 3.

Wherein, the two adjacent single batteries 1 are connected in series with one another through the connecting piece 3, the voltage detection probe 22 is welded on the connecting piece 3, and the acquisition precision of the voltage detection probe 22 is further improved through a direct welding mode.

Wherein, two mounts 4 set up in the both sides of battery cell 1 relatively, it is provided with a plurality of mounting grooves 41 that are used for inserting and establish battery cell 1 and a plurality of logical groove 42 corresponding with battery cell 1's utmost point post 12 position to arrange on mount 4, the quantity that mounting groove 41 and logical groove 42 are more than or equal to battery cell 1's quantity, in order to satisfy all battery cell 1 homoenergetic and install on mount 4, and the accessible sets up the clearance size between two adjacent mounting grooves 41 and controls the clearance size between two adjacent battery cell 1, provide the inflation space for battery cell 1, and need not to add between two adjacent battery cell 1 and establish the buffering spacer, in order to reduce cost.

The PCB 21 is fixedly connected to one side of the fixing frame 4 far away from the single battery 1, and the connecting piece 3 penetrates through the two adjacent through grooves 42 from outside to inside and is fixedly connected to the fixing frame 4, so that the fixing frame 4 is utilized to carry the PCB 21 and the connecting piece 3.

Importantly, through the combination of the above schemes, the fixing and positioning of the single battery 1, the PCB 21 and the connecting piece 3 are realized by the fixing frame 4, so that the relative positions of the voltage detection probe 22, the connecting piece 3 and the pole 12 are more stable, and the high-precision acquisition of the voltage of the pole 12 is ensured.

Preferably, a plurality of isolation columns 43 are arranged on one side surface of the fixing frame 4 facing the PCB 21, and the PCB 21 abuts against and is screwed with the isolation columns 43, so that a gap is formed between the fixing frame 4 and the PCB 21. Specifically, the PCB 21 is provided with a plurality of screw holes 211 corresponding to different positions of the separation posts 43, the diameter of the screw holes 211 is smaller than the diameter of the separation posts 43, and screws pass through the screw holes 211 from outside to inside and are screwed with the separation posts 43.

Preferably, referring to fig. 5 and 6, the connecting member 3 includes a U-shaped main body 31 and two folded edges 32 extending from two sides of the U-shaped main body 31 along outward bending, the two folded edges 32 respectively penetrate through two adjacent through slots 42 of the fixing frame 4 and abut against the same side pole 12 of two adjacent single batteries 1, the U-shaped main body 31 is provided with a plurality of connecting holes 33, the fixing frame 4 is provided with a pin 44 riveted with the connecting column, the connecting member 3 is fixed on the fixing frame 4 by the cooperation of the connecting holes 33 and the pin 44, and a pre-tightening force is provided for the abutment of the folded edges 32 and the pole 12. Of course, the flange 32 and the pole 12 may be welded to ensure electrical connection.

Preferably, referring to fig. 6 and 7, the fixing frame 4 is sequentially divided along the length direction thereof to form a plurality of sub-frame bodies 401, and all the sub-frame bodies 401 of the same fixing frame 4 are fixedly connected to the PCB 21. Specifically, each sub-frame 401 is provided with the mounting groove 41, the through groove 42, the isolation column 43 and the pin 44, and the corresponding sub-frames 401 in the two fixing frames 4 can be used for clamping and assembling a certain number of single batteries 1 so as to separate all the single batteries 1 into a plurality of small battery modules, so that the detection and the replacement are facilitated, and meanwhile, the rigidity of the PCB 21 can be used for assisting the alignment and the arrangement of the small battery modules and providing a certain supporting function.

Referring to fig. 4, in the embodiment, at least one of the two signal collecting components 2 may further include a plurality of fault detecting probes 24, wherein one of the two poles 12 of the single battery 1 is electrically connected to the battery housing 11 of the single battery 1, so that one of the poles 12 and the battery housing 11 form an equipotential, for example, the positive pole is electrically connected to the battery housing 11 to form an equipotential. Of course, the specific implementation manner of the conductive connection between the terminal 12 and the battery case 11 may be an internal wiring manner of the single battery 1, an external wiring manner, or an integrated molding manner of the two, which is not limited in this embodiment.

The number of the fault detection probes 24 can be equal to the number of the single batteries 1, or can be less than the number of the single batteries 1, and different fault detection probes 24 are respectively connected with the battery shells 11 in different single batteries 1 to collect voltage signals of all or part of the battery shells 11.

Through the combination of the above schemes, the voltage signal of the electrode post 12 in the single battery 1 is acquired by the voltage detection probe 22, the voltage signal of the battery shell 11 is acquired by the fault detection probe 24, and then the voltage signal of the electrode post 12 and the voltage signal of the battery shell 11 are compared and analyzed by the signal processing unit 23 to identify whether the single battery 1 has a fault, such as whether the battery shell 11 is corroded.

Preferably, the plurality of fault detection probes 24 are integrated on a flexible circuit board 25, and the flexible circuit board 25 is electrically connected to a side of the PCB 21 away from the voltage detection probe 22.

Specifically, the number of failure detection probes 24 in each signal collection part 2 is the same as the number of sub-housings 401 in each fixing frame 4, and the failure detection probes 24 collect a voltage signal of a certain battery case 11 in a small battery module to determine whether there is a failure in the small battery module.

Referring to fig. 4, in the present embodiment, the signal acquisition part 2 further includes a temperature detection probe (not shown), and the temperature detection probe is configured to acquire a temperature signal of the single battery 1. The temperature detection probe may be integrated on the voltage detection probe 22, or integrated on the fault detection probe 24, or independently connected to the pole 12 of the single battery 1, or independently connected to the battery housing 11 of the single battery 1, so as to be able to indirectly or directly collect the temperature signal of the single battery 1.

Referring to fig. 4, in the present embodiment, the signal collecting component 2 further includes a connector 26, and the connector 26 is disposed on the PCB 21 and is used for transmitting the battery signal collected by the signal collecting component 2 or the signal processed by the signal processing unit 23 to the electric device.

Referring to fig. 1 and 2, in the present embodiment, the battery module further includes a box 5, a movable pressing plate 6, a pressing member 7, and an abutting plate 8.

The plurality of single batteries 1 are sequentially arranged side by side in the box body 5 to form a group, the movable pressing plate 6 is movably arranged in the box body 5 along the arrangement direction of the plurality of single batteries 1, one single battery 1 at one end is abutted against one enclosing plate 52 of the box body 5, and the single battery 1 at the other end is abutted against the movable pressing plate 6.

Specifically, with reference to the direction shown in fig. 2, the box 5 includes a bracket-type liquid cooling plate 51 and four enclosing plates 52, and the bracket-type liquid cooling plate 51 is supported below the single battery 1 to cool the single battery 1; the four enclosing plates 52 are connected to the periphery of the bracket type liquid cooling plate 51 through bolts to enclose an installation cavity for accommodating the single battery 1, the enclosing plates 52 are in a low style, namely the height of the enclosing plates 52 is larger than that of the single battery 1, and the enclosing plates 52 at the rear end abut against the rear side face of the single battery 1 at the rear end; the movable pressing plate 6 is movably connected to the bracket type liquid cooling plate 51 through a bolt, abuts against the front side face of the single battery 1 at the front end, and is clamped by matching the enclosing plate 52 and the movable pressing plate 6 so as to adapt to the assembly of different numbers of single batteries 1; the two coamings 52 of the left and right sides respectively abut against the lower half parts of the two fixing frames 4 and are positioned below the signal acquisition part 2 and the connecting piece 3, so that the limitation on the left and right sides of the single battery 1 is realized while the signal acquisition part 2 and the connecting piece 3 are not influenced, and force is provided to indirectly compress the folded edge 32 of the connecting piece 3 on the pole 12 of the single battery 1.

Wherein, the two ends of the pressing member 7 are respectively connected to a coaming 52 of the box body 5 and the movable pressing plate 6, and press one side of the plurality of single batteries 1 away from the bottom of the box body 5.

Specifically, pressing down 7 and being the type of falling U form, the horizontal limit butt that presses down 7 is in the top of single cell 1, and two perpendicular limits that press down 7 are respectively through bolt fixed connection on the bounding wall 52 and the activity clamp plate 6 of rear end, combine box 5, activity clamp plate 6 and press down 7 in order to realize binding a plurality of single cell 1's whole, and the integral connection is more firm.

In particular, the pressing member 7 is provided with a pad strip 71, and the pad strip 71 is located between the transverse edge of the pressing member 7 and the single battery 1, so as to avoid rigid contact between the pressing member 7 and the single battery 1. Preferably, the gasket 71 has elasticity, thereby providing a space for the unit cell 1 to expand in the vertical direction.

The abutting plate 8 is clamped between the single battery 1 and the movable pressing plate 6 or between the single battery 1 and the enclosing plate 52 of the box 5, so as to avoid rigid contact between the single battery 1 and the movable pressing plate 6 or the enclosing plate 52.

Specifically, the abutting plates 8 are provided with two abutting plates, the height of the abutting plates 8 is matched with the height of the single battery 1, one abutting plate 8 is located between the coaming 52 at the rear end and the single battery 1 at the rear end, and the other abutting plate 8 is located between the movable pressing plate 6 and the single battery 1 at the front end. In addition, two butt joint boards 8 still all are located the inboard of two perpendicular limits of compressing tightly piece 7 to borrow compressing tightly piece 7 and retrain two butt joint board 8's first half, avoid butt joint board 8's first half outside warpage.

Additionally, the utility model also discloses an electric installation, this electric installation include as above any kind of battery module.

The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by the arbitrary combination of the above technical features. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.

Claims (14)

1. A battery module, comprising:

the single batteries are arranged side by side and connected in series, each single battery is provided with two pole columns with opposite polarities, the two pole columns are respectively positioned on two opposite sides of each single battery, and the pole columns on the same side of every two adjacent single batteries are opposite in polarity;

the two signal acquisition components are respectively positioned on two opposite sides of the single battery and connected with different poles on the single battery so as to acquire voltage signals of the two poles on the single battery, wherein the signal acquisition components comprise a PCB (printed circuit board) and a plurality of voltage detection probes for being connected with the poles, and the plurality of voltage detection probes are sequentially arranged on the PCB along the arrangement direction of the single battery;

and the two signal acquisition parts are respectively and electrically connected to the signal processing unit.

2. The battery module according to claim 1, wherein the number of the signal processing units is two, and the two signal processing units are respectively disposed on the two PCB boards.

3. The battery module according to claim 1, wherein the voltage detection probe on each signal acquisition component is used for acquiring voltage signals of the poles on the same side at intervals.

4. The battery module according to claim 3, wherein the poles on one side of two adjacent single batteries are connected in series through a connecting piece, and the voltage detection probe is welded to the connecting piece.

5. The battery module according to claim 4, further comprising two fixing frames oppositely disposed on two sides of the single battery, wherein the PCB is fixedly connected to a side of the fixing frame away from the single battery, the fixing frame is provided with a plurality of mounting slots for inserting the single battery and a plurality of through slots corresponding to positions of poles of the single battery, and the connecting member penetrates through two adjacent through slots from outside to inside and is fixedly connected to the fixing frame.

6. The battery module according to claim 5, wherein the fixing frame is sequentially divided along a length direction thereof to form a plurality of sub-frame bodies, and all the sub-frame bodies of the same fixing frame are fixedly connected to the PCB.

7. The battery module according to claim 5, wherein a plurality of isolating columns are arranged on one side surface of the fixing frame facing the PCB, and the PCB abuts against and is in threaded connection with the isolating columns so that a gap is formed between the fixing frame and the PCB.

8. The battery module according to claim 1, wherein at least one of the two signal collecting members further comprises a plurality of fault detecting probes, the positive electrode terminal of the single battery is electrically connected with the battery housing of the single battery, and the fault detecting probes are connected with the battery housing to collect at least part of the voltage signal of the battery housing.

9. The battery module as recited in claim 8, wherein the plurality of fault detection probes are integrated on a flexible circuit board, and the flexible circuit board is electrically connected to a side of the PCB board away from the voltage detection probes.

10. The battery module according to claim 1, wherein the signal acquisition component further comprises a temperature detection probe configured to acquire a temperature signal of the battery cell.

11. The battery module according to claim 1, further comprising a box and a movable pressing plate, wherein the plurality of single batteries are sequentially arranged side by side in the box to form a group, the movable pressing plate is movably arranged in the box along the arrangement direction of the plurality of single batteries, one end of the movable pressing plate abuts against a surrounding plate of the box, and the other end of the movable pressing plate abuts against the single battery.

12. The battery module according to claim 11, further comprising a pressing member, wherein two ends of the pressing member are respectively connected to a surrounding plate of the case and the movable pressing plate, and press one side of the single batteries away from the bottom of the case.

13. The battery module according to claim 11, further comprising an abutting plate that is clamped between the single battery and a movable pressing plate and/or between the single battery and a surrounding plate of the case body.

14. An electric device comprising the battery module according to any one of claims 1 to 13.

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